Children are especially vulnerable to alcohol’s toxic effects as their brains and bodies are still developing

The figures come just months after it emerged children as young as four are being referred to drugs and alcohol treatment services.

Referrals can mean children are vulnerable to misuse, either through exposure from a parent or relative, or from starting to abuse substances themselves.

In the case of the four-year-old, in South Ayrshire, “parental substance misuse” prompted the move.

Mr Hume called for the Scottish Government to work with young people.

Dr Evelyn Gillan, chief executive of Alcohol Focus Scotland, said the new data highlighted a need for more to be done to protect children.

She said: “Children are especially vulnerable to alcohol’s toxic effects as their brains and bodies are still developing. But they are encouraged to drink by pocket money prices and positive messages about drinking they see all around.”

The Scottish Government said its planed 50p-per-unit minimum price for alcohol would help tackle the country’s “difficult relationship” with drink. It has been delayed by a legal challenge.

A spokeswoman added: “We are currently taking forward substance misuse education work in schools, where young people will learn about a variety of substances, including alcohol. They will explore the impact that risk-taking behaviour has on life choices and health.”